diff --git a/default.nix b/default.nix
index 8821972..a78c991 100644
--- a/default.nix
+++ b/default.nix
@@ -15,7 +15,7 @@
   sbclPackages,
   makeWrapper,
   openssl,
-  build-asdf-system,
+  # build-asdf-system,
   pkgs,
   ...
 }:
@@ -36,7 +36,7 @@ let
     pkgs.openssl.dev
   ]);
 in
-build-asdf-system {
+stdenv.mkDerivation {
   name = "tfcconnection";
   pname = "tfcconnection";
   version = "0.0.1";
@@ -59,15 +59,15 @@ build-asdf-system {
     # openssl.dev
   ];
 
-  # buildInputs = [
-  #   # rustPlatform
-  #   # clippy
-  #   # rustfmt
-  #   # openssl
-  #   # openssl.out
-  #   # openssl.dev
-  #   sbcl'
-  # ];
+  buildInputs = [
+    # rustPlatform
+    # clippy
+    # rustfmt
+    # openssl
+    # openssl.out
+    # openssl.dev
+    sbcl'
+  ];
 
   nativeLibs = [
     openssl
@@ -75,33 +75,30 @@ build-asdf-system {
     openssl.dev
   ];
 
-  lispLibs = with sbclPackages; [
-    hunchentoot
-    dexador
-    jzon
-    serapeum
-    deploy
-    spinneret
-    lass
-    cl-smtp
-    log4cl
-  ];
+  # lispLibs = with sbclPackages; [
+  #   hunchentoot
+  #   dexador
+  #   jzon
+  #   serapeum
+  #   deploy
+  #   spinneret
+  #   lass
+  #   cl-smtp
+  #   log4cl
+  # ];
 
   # ${cargo}/bin/cargo build
-  # buildPhase = ''
-  # export HOME=$(pwd)
-  # ${sbcl'}/bin/sbcl --load build.lisp
-  # '';
+  buildPhase = ''
+  export HOME=$(pwd)
+  ${sbcl'}/bin/sbcl --load build.lisp
+  '';
 
-  systems = "tfcserver";
+  # systems = "tfcserver";
 
-  buildScript = ./build.lisp;
+  # buildScript = ./build.lisp;
 
   # cp target/debug/tfcapi $out/bin
   installPhase = ''
-  mkdir -pv $out
-  cp -r * $out
-  rm -fv $out/tfcserver
   mkdir -p $out/bin
   cp -v tfcserver $out/bin
   wrapProgram $out/bin/tfcserver \
diff --git a/flake.lock b/flake.lock
index 385a61c..9ee5ba4 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,5 +1,20 @@
 {
   "nodes": {
+    "cl-nix-lite": {
+      "locked": {
+        "lastModified": 1709357207,
+        "narHash": "sha256-YZgXj6oL2Y/zDkSkGcoacpQPRLiYM8KeEB68CUs2irc=",
+        "owner": "hraban",
+        "repo": "cl-nix-lite",
+        "rev": "f55d263b30a601b1b4dd61b7c8787e97510f4018",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hraban",
+        "repo": "cl-nix-lite",
+        "type": "github"
+      }
+    },
     "flake-utils": {
       "inputs": {
         "systems": "systems"
@@ -36,6 +51,7 @@
     },
     "root": {
       "inputs": {
+        "cl-nix-lite": "cl-nix-lite",
         "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs"
       }
diff --git a/flake.nix b/flake.nix
index ae133d9..9dd2d34 100644
--- a/flake.nix
+++ b/flake.nix
@@ -4,18 +4,19 @@
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
     flake-utils.url = "github:numtide/flake-utils";
+    cl-nix-lite.url = "github:hraban/cl-nix-lite";
   };
 
-  outputs = { self, nixpkgs, flake-utils }:
+  outputs = { self, nixpkgs, flake-utils, cl-nix-lite }:
     flake-utils.lib.eachDefaultSystem
       (system:
         let
-          pkgs = nixpkgs.legacyPackages.${system};
+          pkgs = nixpkgs.legacyPackages.${system}.extend cl-nix-lite.overlays.default;
           src = ./.;
         in 
         {
           devShell = import ./shell.nix { inherit pkgs; };
-          defaultPackage = import ./default.nix { };
+          defaultPackage = pkgs.callPackage ./default.nix { };
         }
       );
 }